Use latest version of oscar-paypal in demo site
Send order currency to Google Analytics

See https://developers.google.com/analytics/devguides/collection/gajs/gaTrackingEcommerce#localcurrencies
Fix issue with calling get_shipping_method
Allow custom static files to be tested in Oscar's sandbox
Revert currency template filter rename

No need for the rename since 0.5.
Merge branch 'master' into fix-processing
Use queryset.none() instead of EmptyQuerySet in basket.all_lines